Telegraph apparatus.



E. POPE.

TELEGRAPH APPARATUS.

APPLICATION FILED JUNE 29, 1915. 1 1,124, Patented Jan. M, 1919.

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E. POPE.

TELEGRAPH APPARATUS.

APPLICATION FILED JUNE 29; 1915 Patentefi Jan. 14, 1919 2 SHEETS-SHEET 2. a

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EDWIN POPE, 0F QUEBEC, QUEBEC, CANADA.

TELEGRAPH APPARATUS.

Specification of Letters Patent.

Patented Jan. 14, 1210.

Application filed .1 une 29, 1915. Serial No. 36,926.

To all whom it may concern Be it known that 1, EDWIN Porn, a subject of the King of Great Britain, residing at Quebec, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Telegraph Apparatus, of which the following is a specification.

My invention relates to improvements in the means for transmitting, receiving and recording telegraphic messages or signals and is particularly intended for use in connection with a telegraphic system wherein a continuous stream of electrical impulses of opposed polarities is transmitted through a main line and is modified in various ways so as to convey a plurality of systems of signals simultaneously over the same main line. An illustration of a system having the general characteristics mentioned will be found in my Letters Patent of the United States No. 1052513, dated February 11th, 1913. But my improved apparatus may also be used in connection with modifications in such a system as is shown in my aforesaid patent. Such a modified and improved system in which this apparatus is particularly adapted to be embodied is shown in a separate application filed by me Serial No. 33229 of1915,

and to which further reference may be made for illustrations of the application of, my improved transmitting, receiving and recording mechanism.

In putting in practice the system of my aforesaid patent, ll preferably employed mechanism, one type of which was illustrated in my Letters Patent No. 1,043,865 of November 12, 1912, wherein each modification was impressed upon the stream of alternations by the immediate manual intervention of an operator. The receiving and sending instrument particularly described in my present application is intended to be used with such a telegraph appliance as is illustrated in my aforesaid Letters Patent Nos. 1,043,865 and 1,052,513, instead of the particular type of receiving-transmitting instrument particularly described in Patent No. 1,043,865. And T have, therefore, not reproduced the illustration of that circuit in my present application, as one skilled in the art will readily understand how my new instrument is to be used therewith at difierent points in the system. In my present invention. 1 use previously prepared records of the messages, which are automatically sent into the line by my improved apparatus, and automatically reproduced in duplicate at the receiving station of the line, thereby economizing time and increasing the volume of business which may be transmitted over a single line.

In the drawings Figure 1 is a plan view; Fig. 2 is an elevation, looking upward on Fig. 1; Fig. 3 is an end view looking to the right on Fig. 2; Fig. 4 is a partial end view loolking to the left on Fig. 2; Fig. 5 is a detai Corresponding reference numerals are used in all the figures to refer to similar parts.

The mechanism is assembled on a suitable bed plate 1, above which standards 2, 2 support a table or top 3.

In suitable bearings in the standards 2 is mounted a shaft 4 to which is keyed a ratchet wheel. 5. An arm 6 swings on the shaft 4 and carries a spring-pressed pawl 7 engaging with the ratchet wheel 5. A link 8 connects the arm 6 with the end of an armature bar 9 rocking between suitable stande ards 10 on the bed plate 1. This armature, bar is rocked by the alternate energizing of two pairs of magnets 213, 213 and 214, 214, with the result that when the magnets 214 are energized they pull down their end of the armature 9 raising the link 8 through the arm 6 and pawl 7, feeding forward the ratchet wheel 5 one tooth space, the play of the armature being adjusted to give this limited feed. And when the magnets 213, 213 are energized, their end of the armature bar 9 is drawn down, lowering the pawl 7 one tooth space on the wheel 5, the wheel 5 being held against retrograde movement by a spring-pressed .detent 14, or other suitable means. Suitable regulating means may be used to counterbalance the parts of the ap-v paratus. Thus if have shown the armature bar 9 as having a flat spring attached to an arm of the armature 9, its free end being controlled between adjusting screws 61 and 62 so that the tension of the spring may be regulated to balance the armaturebar 9; and a spring 63 may be connected, as by a link 64, with the link 8, so as to. assist in counterbalancing the parts actuated by the armature bar 9.

A toothed wheel 11 is keyed to the shaft 4, its teeth projecting up through a slot 12 in the top 3 into a channel 13 between guides 17 17 on the top 3 of the machine.

Over the wheel 11 is pivoted a lever 20 having a cam end 21 which is adapted to drop between the teeth of its wheel, not looking the same but allowing the wheel to be fed forward, each tooth raising the cam end 21 of the lever 20 and dropping it again behind the tooth. The lever arm 20 also carries a dependent, pivoted arm or needle 22, which may rise and fall with the lever 20 through an opening in the guide and the top of the machine below it. An insulated end 24 of the lever 20 controls a vertically, flexible or elastic circuit breaker or switch 234 in a circuit 15 in such a way that the circuit 15 will not be broken by the rocking of the lever 20 up and down by the passage of the teeth of the wheel 11 past the cam end 21, but will be opened if the needle 22 drops down through the opening into the top 3 of the machine.

A cam 25 is pivoted to the top of the machine and is actuated by handle 26, and en gages below the lever 20 in such a way that when the handle is thrown down, as shown in Fig. 3, the cam will lock the lever 20, preventing its dropping and opening the circuit breaker.

A tape or strip of paper 27 is provided with a series of feed holes 28, 28 disposed at uniform intervals along it, the spacing of the holes corresponding to the spacing of the teeth upon the wheel 11. The tape is also provided with signal holes, as 29, 29 disposed at irregular but predetermined intervals in relation to the feed holes, the distances between the signal holes indicating the character of the signal which is to be transmitted. Thus the signal A may, for instance, be illustrated by a group of four feed holes with a signal hole opposite to the second and fourth of the feed holes; the letter B may be indicated by a group of eight feed holes with a signal hole opposite the fourth and eighth feed hole, and so on, the essential thing being that a predetermined value shall be attached to the relative disposition of a series of feed holes and a signal hole or holes.

On the shaft 4 is mounted another toothed Wheel 30, similar to the wheel 11, the teeth of which project up into a slot 31 in the top of the machine, into an opening under guides 32, 32.

Two pairs of electromagnets 224, 224 and 225, 225, all included in the same circuit. are adapted, when energized, to rock down an armature bar 33, which is pivoted in suitable bearings 34, 34, on the top of the machine, the armature bar 33 being rocked in the opposite direction by a pair of electromagnets 216, 216 in another circuit, which is adapted to be energized alternately with the circuit of magnets 224 and 225. A rod 35 through the armature bar 33, is locked and held by a suitable thumb nut 36. A lock nut 37 clamps one end of a looped spring 38 against another nut 39 011 the end of the rod 35, the other end of the spring engaging around the shank of the punch 41 below the head 40, so that the punch will be pushed down through the guide 42 by the end of the rod 35 and will be raised through the spring 38. A channel opens down through the guide 42 and the machine top 3 affording a path for the punch 41 to travel in to one side of the toothed wheel 30, the adjustment of the parts of the apparatus being such that when the punch is depressed by the armature bar 33 its end will pass into the top 3, and when the punch is raised by the armature bar, its end will clear the top 3. A strip of paper having a uniform series of feed holes registering with the teeth of the wheel 30 may be fed forward, step by step, by the wheel 30 under the guides 32, 32 on the top of the machine and below the punch 41, which, when depressed, will punch in the paper strip a hole indicating the point in the travel of the paper at which the punching operation takes place.

A disk 45 is attached to the shaft 1. It carries a pivoted stop 46, pressed to duty by a spring 47. The diameter of the disk is re duced around a segment of its circumference, as from 48 to 49, and its edge slotted and deflected inward at one side of the slot, so as to form a cam flange 50. An arm 51 is pivoted to the end of the armature bar 33. and is drawn inward by a tense spring stretched between it and the frame of the machine. When the disk 45 revolves with the shaft 4 the cam flange 50 engages with the end of the arm 51 and carries it outward behind the reduced portion of the edge of the disk 45. And if the end of the armature 33 carrying the arm 51 is depressed, the arm will be held outward by the disk 45, the disk revolving until its spring stop 46 meets the end of the arm 51, when the disk 45 and shaft 4 will be brought to rest. If. however. the end of the armature 33 raises the arm 51. while the reduced part of the disk 45, from 48 to 49, is passing the end of the arm 5 l. the end of the arm will be raised above the disk and allowed to be drawn inward by the spring 52, and the forward movement of the disk 45 and shaft 4 is not interrupted.

If when the parts are in the positions shown in Fig. 4, with, the end of the arm 51 engaging the stop 46, a signal is sent over the line which causes the magnets 224 and 225 to draw down their end of the armature 33, operating the punch, the arm 51 will be lifted so as to release the stop 46 allowing the disk 45 and shaft 4 to be revolved forward by the driving magnets, as already described.

An arm 55 is attached to the shaft 4 but is nae-nine insulated from it. A spring 56, hearing against the disk-like hub of the arm 55, puts the arm 55 into the circuit of the call magnet. And when the revolution of the shaft t brings the arm 55 opposite to the arm 51, if the arm is raised its element 57 is. lifted into contact with the bent over end of the arm 55 completing the circuit and operating the call magnet.

The arm 55 is placed tocorrespond to a difi'erent tooth of the driving wheel of each machine at each station. This being so, the operator at a calling station will know how many feed steps the apparatus must perform after arm 51 has been freed from the stop 46, and before the contact 57 will be in line with the arm 55. Therefore a punching signal, rocking the bar 33, can be sent to take effect at the instant when contact 57 and arm 56 are in line, so as to raise the contact 57 and complete the circuit sounding the call; and the closing of the circuit through 55 and 57 may be made to, for instance, start a call bell, which Will continue to ring until the receiving operator stops it.

The call magnet may be arranged to start the receiving tape through the machine, or to ring a hell, or both. The reduced diameter of the disk 45, between 48 and 4:9 is to be of sufficient length to insure the release of the arm 51, over its edge, by any of the letter combinations, that is if the longest letter combination should cover nine feeding steps of the tape, corresponding with nine ratchet teeth of the wheel 5, the reduced position of the disk L5 should exceed a corresponding are of the disk, so that the connection between the arm and disk may be certainly broken by any letter combination.

This improved machine may, therefore, be used both for sending or for receiving. For it will be evident that either a sending tape may be operated by wheel 11, or a receiving tape by Wheel 30 as may be desired, and irrespective of Whether the signals are given by increasing the strength of impulses, introducing neutral intervals, or otherwise modifying impulses, as by lengthening them.

Having thus described my invention what T claim and desire to secure by Letters Patent of the United States, is:

l. The combination, in a telegraph instrument adapted for use in a circuit transmitting a continuous series of electrical alternations, of sending means embracing a circuit breaker adapted to create signals by breaking the circuit, means governing the action of the circuit breaker, and measuring means to determine the value of the signals by the extent of its movement between them, receiving means embracing translating means for changing received signals into mechanical movements, movable measuring means adapted to determine the signal value of the mechanical movements by the extent of its travel intermediate the same, and common means for actuating both measuring means;

2. The combination, in a telegraph instrument adapted for use in a circuit transmitting a continuous series of electrical alternations, of means for producing electrical signals in the circuit, movable measuring means to determine the value of said signals by the extent of its travel intermediate them, means for receiving electrical signals, movable means for measuring the value of the received signals by its travel intermediate them, and common means for operating both measuring means.

3. The combination, in a telegraph instrument adapted for use in a circuit transmitting a continuous series of electrical alternations, of means for producing electrical signals in the circuit, movable measuring means to determine the value of said signals by the extent of its travel intermediate them, means for receiving electrical signals, movable means for measuring the value of the received signals by its travel intermediate them, and common means for operating both measuring means step by step.

l. The combination, with an electric circuit, conveying a continuous series of current alternations, of a sending instrument and a receiving instrument mechanically operable thereby, selective mechanism adapted to restrain the action of the receiving machine, and means initiated by a signal from the sending machine to release the receiving machine from the control of the selective mechanism.

The combination, with an electric circuit provided with means for producing a continuous series of current reversals therein, of a receiving telegraph instrument adapted to be actuated by said current reversals and embodying means for translating electrical signals into mechanical movements, measuring mechanism traveling intermediate of the movements of the trans lating means, releasable means for arresting the movement of the measuring means, and means actuated: by the signal translating means for releasing the measuring means.

6. The combination, in a receiving telegraph instrument adapted for use in an electric circuit conveying a continuous series of current alternations, of means for translating electrical signals into mechanical movements, measuring mechanism traveling intermediate of the movements of the translating means, releasable means for arresting the movement of the measuring means, and means actuated by the signal translating means for causing the arresting means to initiate the action of calling means.

7. The combination with an electric cirr&

cuit provided with means for producing a continuous serles of current reversals there .in, of a telegraph receiver adapted to be actuated by said reversals and embodying signal receiving and recording means, coacting feeding and measuring means, and means governed by the first mentioned means for preliminary initiating the movement of the second mentioned means.

8. The combination, in a telegraph receiver of signal receiving and recording means, rotating feeding and measuring means, arresting means, a rotating cam cooperating With the arresting means to hold 5 the feeding and measuring means at a predetermined position, and means actuated by the signal recording means for initiating the action of calling means and releasing the arresting means.

9. The combination, with a telegraph circuit, of duplicate machines placed at difierent points therein, each machine being provided with signaling means and signal reeeiving and recording means, eoacting feeding and measuring means, and means governed by the first mentioned means for initiating the movement of the second mentioned means at a time selected by the signaling means of another of the duplicate machines.

EDXVIN POPE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 6. 

